THIRUVANANTHAPURAM: The Neyyattinkara police have registered a case in connection with the vandalism of an office of the Nair Service Society (NSS) on Sunday. According to the police officers, the incident was reported from the office at Venpakal, near Neyyattinkara. The attack by unidentified miscreants is believed to have taken place by around 1 am. Stones were allegedly hurled at the office, thereby breaking the window panes on the premises. Flag poles outside the office were also found to be destroyed, the police said.